MESON Chess Problem Database

Problem Display
PID: 248940 (8/P1p1p3/2P1P1P1/3k4/K1NPp1P1/8/3N1BP1/3Q4 w - - 0 1)

Blikeng, Bjarne

Dagbladet, 1976

(First published on Sat Sep 25 1976)

8/P1p1p3/2P1P1P1/3k4/K1NPp1P1/8/3N1BP1/3Q4

#2

12 + 4

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.a8Q#
      • 2.a8B#
  • Tries
    • 1.Be3?
      • 1...Kxc6
        • 2.a8Q#
        • 2.a8B#
      • 1...Kxe6!
    • 1.Qc2?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qxe4#
        • 2.a8Q#
        • 2.a8B#
      • 1...e3
        • 2.Qe4#
      • 1...Kxe6!
    • 1.Qf3?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qxe4#
        • 2.a8Q#
        • 2.a8B#
      • 1...Kxe6
        • 2.Qf5#
        • 2.Qf7#
      • 1...exf3!
    • 1.Qb1?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qxe4#
        • 2.Qb5#
        • 2.a8Q#
        • 2.a8B#
      • 1...e3
        • 2.Qe4#
      • 1...Kxe6!
  • Keys
    • 1.Sxe4!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kxc6
        • 2.a8Q#
        • 2.a8B#
      • 1...Kxe6
        • 2.d5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XP(I)::P=Q
  • Tries
    • Try
      • B(C);
      • Vars
        • K(b);S_FLIGHT,XP(I)::P=Q
      • Refutation
        • K(b);S_FLIGHT,XP(J)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(J)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAB1(A),XP(a)
      • Refutation
        • P(a);N_SPINP(a),XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(J)
  • Actual
    • S(B);XP(a)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
      • K(b);OGATEB,S_FLIGHT,XS(B)::QAB1(A)
      • K(b);S_FLIGHT,XP(I)::P=Q
      • K(b);OGATE,S_FLIGHT,XP(J)::P(G)
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